Aerosol overcap



FIG. 1 is a perspective view of the aerosol overcap showing my new design with an aerosol can shown in broken lines for illustrative purposes only, and forming no part of the claimed design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side view of the aerosol overcap, the left side being a mirror image thereof;

FIG. 4 is a front plan view thereof; and,

FIG. 5 is a back plan view thereof.

The bottom view is not seen in use and forms no part of my new design. 

The ornamental design for an aerosol overcap, as shown and described. 